use spooling for very large limit case
Extend precision to 38 and allow stored values without restriction.
Merge pull request #330 from maryannxue/iss322

Fix issue #322
Merge pull request #331 from tonyhuang/decimal

Extend precision to 38 and allow stored values without restriction.
Merge pull request #326 from JingchengDu/master

Add e2e test for the newly added data types, tinyint, smallint, float and double
Add double literal to grammar
Merge remote-tracking branch 'upstream/master'
Add the double support to DateSubtractExpression